No, OWLCS cannot be licensed, and no plans to make it licensable at this time. Suggest you take a look at these licensable products from CGBU which contain similar features and functionalities: Oracle Communications Converged Application Server (OCCAS) and Oracle Communications Presence (OCP).
Oracle Communicator Client is bundled with Oracle Communication Mobility Server (OCMS). It is available only for demo and non-production uses, and not licensable for production deployments. OCMS is downloadable from OTN.
Regarding OCP (Oracle Communications Presence), here is the page on OTN: